id try take him out later than 9 if possible,my pup is 6 month old now and fully house trained she hasnt had an accident in the house since she was 14 weeks,but i let her out at half 10 and she use to wake me up barking at the door about every 3 hours untill about 3 weeks ago when she started waking me up every morning at 5,she has just this last week stoped waking me every morning and it is just occasionaly,i dont think they can hold their bladder till they are 8 month or so